High pressure reciprocating compressor



May 19, 1931. c. scHAx-:R

HIGH PRESSURE RECIPROCATING COMPRESSOR Filed NOV. 2Q, 1928 lnk/ENTE] Fg (fm ATi-m RNEY.

EN @bw MW; /I/W f WM Patented May 19, 1931 narran srares FFA'ENT @FMQLE CHARLES semina, or LANGnii'r-HAL, SWITZERLAND, .essieiion To THE rinivi: sULznR FRRES sooinrii Aitor 'Inn on wir-mantenne, swi'rznnnnnn I-IEG-H PRESSURE RECPROCATING COMPRESSOR Application filed November 2G, 1928, Serial No.

This invention relates to high pressure reciprocating `compressors of the kind in which power is transmitted from the piston of a driving machine through an oscillating column of liquid to an intermediate piston which actuates the compressor piston. The invention relates more particularly to compressors of the above kind in which the intermediate piston is exposed on both sides to the action of a column of liquid so as to be moved thereby positively in both directions. The object of the invention is to improve the operation of compressors of this kind and to render their working parts more accessible.

According to the present invention the compression stroke of each compressor piston is effected by means of a liquid column `actuated directly by the piston of the driving machine whilst the suction stroke of the compressor pistons is effected by means of a liquid column which couples these pistons and vis actuated indirectly by the piston of the driving machine through each interinediate piston. lThe intermediate pistons are preferably ,disposed beneath the compressor pistons and the column of liquid directly actuated by the piston of the driving machine acts on those surfaces of the intermediate pistons which are remote from the compressor pistons. In addition the intermediate pistons may also be disposedat Ia lower level than the piston of the driving linachine whilst the column of `liquid indirectly actuated through the intermediate pistons may act on those surfaces of the-intermediate pistons which are directed towards the compressor pistons.

rThe invention may be carried into effect in various ways but one construction of compressor accordinglthereto is illustrated by way of example in the accompanying drawings in which Figure l illustrates the compressor in plan7 part of the apparatus being shown in cross-section,

Figure 2 shows a cross-section on the line a-a; in Figure l, and

Figure 3 shows a cross-section on the line J-b in Figure 1.

320,553, and in Switzerland December 12, 1927.

In the construction illustrated in the drawings the piston 5, termed the piston of the driving machine is reciprocatcd in the cylinder 6 through a piston rod 4, cross-head 3 and connecting rod 2 by means of a crank l which is driven from a source of power not shown in the drawings. From the two ends of the cylinder 6 lead lil-shaped conduits 7 and 9 respectively which are enlarged at their other ends to receive intermediate pistons 8 and 10. These intermediate pistons are connected by means of couplings l2 and 14 to compressor pistons ll and 13 respectively mounted to reciprocate within cylinders 19 and 20 as shown.

The conduit 7 and the space within the cylinder G to the right of the piston 5 is filled with liquid forming a column l between the pistons 5 and 8. Similarly the conduit 9 and thespacc within the cylinder 6 to the left of the piston 5 is also filled with liquid forming a column il between the pistons 5 and l0. In addition a third liquid column Ill is provided (hereinafter refer-red to as the coupling column) which is in communication with those surfaces of the intermediate pistons 8 and i0 which arx directed towards the compressor pistons.

ln order to compensate for leakages from the liquid columns I, 1l and Hi they are permanently connected through pipes 15, 1G and l? to a pump which maintains the requisite working pressure within the colunins, which may for example be 6U atmospheres in the columns l and 1I and l0 atmospheres in the column H1.

As can be seen from the drawing the intermediate pistons 8 and l0 are disposed beneath the compressor pistons ll and 13 and are also at a lower level than the piston 5 of this driving machine whilst the conduits 7 and 9 containing the liquid columns l and Il are disposed below the intermediate pistons on which these columns act and extend obliquely with respect to the longitudinal axis of the piston rod 4; of the driving machine.

When the crank l rotates in the direction of the arrow 18 and the piston ."5 moves to the left (arrows shown in full lines) the liquid column II is forced into theV the cony duit 9 and acts on the under surface of the intermediate piston 10 -t'nus forcing it upwards and causing the compressor piston 13 to compress the medium within `the cylinder 20. At the same time the upward movement ot'` the intermediate piston l() causes the coupliiigpcolumn III to act on the upper surfacev of the intermediate pistonV 8 thus torcing'itdownwards and effecting the suctionv stroke ot thev compressor pistonV 1l within the cylinder 19. Simultaneously' the liquid column I. moves to till up the righthand end portion of the cylinder 6.

vDuring the'return strolrefo Ithepistonr 5 (indicated in the drawing by arrows shown in dotted lines) the liquid column I is forced into the conduit 7' and acts on the un'- der surface et the intermediate piston 8 and so eiiects the compression strolreot the pisv ton ll. Atthe same time the intermediate pressor pistons it need only be columnyIII to compensatefor lealzages is ,although acted upon' on both pistonk 10 is forced downwards under the action of thel liquid ycolumn III and etiects the suction stroke within the Acompressor cylinder 19;VV y

In contrast kto the method ot construction, in which the intermediate pistons, sides by a liquid column, are driven indirectly, that is to say throughtwo columns, by the piston of the driving Vmachine, the invention has the advantage of eliniinatingdiiring the the various .pistons is such that Vparts ot`v the machine are easily .accessible and those partswhich are particularly subjected to wear can be readily removed and replaced.

I claim.: n Y y 1. Apparatus of the class described comf yprising, a primary cylinder, a primary piston ,v within the primary cylinder, Vtwo secondaryY cylinders, a secondary pistonwithin each secondarycylinder, conduits connectingeach end ot the'primary cylinder with an end of eachot the secondary cylinders and the oppositev ends of the secondary cylindeisy .with each other, liquid filling the space in the conduits andthe primary and the secondary cylinders, and means for reciprocatingv the primary piston whereby motion isy transmitted from the "primary, piston to the secondary pistons through the ,l liquid.

2.r Apparatus of the class described comprising, a primary cylinder, a primary Apiston within the primary cylinder, two intermediate cylinders, an intermediate piston within each intermediate cylinder, two compressor cylinders, a compressor' pistoncon- Vnected to eachv intermediate piston and mounted within each compressor cylinder, conduits connecting each end, ot the primary cylinder `with an end ot each ofthe inter-v mediate cylinders, and the opposite ends of the intermediate cylinders with each other, liquid filling the spaces in the conduit, in the primary cylinder and in the ,intermediateV cylinders, and means for reciprocating the primary piston, whereby motion is transmitted from the primary'piston ito the intermediate pistons through the liquid. Y Y

3. Apparatus of the class describedcomprising, a horizontally arranged primary cylind'eiga primary piston within tlieprimary cylinder, two vertically arranged intermediate cylinders, an Vintermediate piston within each intermediate cylinder, two

compressor cylinders, a'compressor piston connected to each intermediate piston vand ymounted' within leach' compressor cylinder,

conduits connecting each end of `the primary cylinder withl an end of 'each of the Aintermediate cylinders and the opposite ends of the intermediate cylinderswith eachother, liquid iilling lthe spaces inthe conduits, in the primary cylinder and .in the intermediate cylinders, and ineansftor reciprocating the primary piston, whereby motionisy transmitted from the primarypiston tov the intermediate pistons .through the liquid. i

4. Apparatus of the class described comprising a horizontally arranged primary kcylinder,a primary piston within the primary cylinder, two vertically arranged intermediate cylinders disposed below the level of thev primary cylinder, an intermediate piston within each intermediate cylinder, two compressor` cylinders,;a `compressor pistoncoiinected to each intermediate piston and mounted within each compressor cylinn der, conduits connecting v each end ofl the primary cylinder with anend. of cachot the intermediate cylinders and the opposite ends of the intermediate cylinders with each other, liquid filling the spacesk in the conduit, in the primary cylinder' and in the intermediate cylinders,`an'd means or'reciprocating theprimary piston, whereby motion is transmitted from the primary piston to the intermediate pistons through the liquid.

In testimony whereot'I have affixed my signature. l

CHARLES SCHAER. 

